Pump-equalizer.



O. D. SHELLABARGER.

PUMP BQUALIZBR. 7 APPLICATION FILED SEPT. 23, 1913.

1,109,706. Patented Sept. 8, 1914.

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CLAUDE D. SHELLABARGER, OF SPOKANE, WASHINGTON.

PUMP-EQUALIZER.

Specification of Letters Patent.

Patented Sept. 8, 1914..

Application filed September 23, 1913. Serial No. 791,444.

and "useful Pump-Equalizer, of which the "following is a specification.

lily invention relates to improvements in pump equalizers in whichsprings areused to develop power on the up-stroke of a pump handle toaid in lifting the Weight of the pump rod and fluid on the down strokeof the pump handle; and the objects of my invention are to provide adevice to equalize the load between the up and down strokes that issimple in construction, that will not easily break or get out of order,and that can be quickly adjusted to increase or diminish the resistanceof the springs. I attainthese objects by the mechanism illustrated inthe accompanying drawing, in which Figure 1 is a view of my completedevice attached to a vertically reciprocating pump; Fig. 2is a view ofone portion of my device attached to the pump in a diderent position;Figs. 3' and l show the two forms detached; F 5 is a top view of one ofthe lever arms; Fig. 6 is a view of the upright standard connecting apair of the lever arms; Fig. 7 is an elevation of the end of Fig. 6;Figs. 8 and 9 are bearings for the lever arms.

Similar characters refer to similar parts throughout the several views.

Referring to the drawing, 1 is the stem or rod of a pump 2 reciprocatingthrough hearing 3 attached to the body of the pump. Supported by thishearing is a collar 4; through which the pump rod 1 reciprocates,

, and a ring 5 is attached to the rod by a pin.

The collar 1 and ring 5 have oppositely disposed recesses 6 to receivethe teeth 7 of the lever arms 8. c The lever arms 8 are ful- Copies ofthis patent may be obtained for crumed in pairs on the standards 9, eachpair of lever arms being connected at their outer ends by a bolt 10passing through holes in the lever arms, enlarged so as to allow of afree movement of the arms. At the ends of the bolt 10 are spiral springs11, the tension of which may be adjusted by the nut 12.

It will be observed that When the pump handle 13 is down, the positionof the lever arms 8, as in Fig. 1, allows the springs 11 to expand, andwhen the pump handle 13 is raised, the inner ends of the upper and lowersprings, which react on the lever arms to raise the pump rod when thepump handle V is forced down.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is 1. The combination with a pump having areciprocating rod, of lever arms :fulcrumed between their ends in pairs,the outer ends of the arms having springs adapted to be compressed bythe movement of the arms, one ofthe lever arms being attached to abearing on the pump and the other to a hearing on the pump rod.

2. The combination with a pump having a reciprocating rod, of lever armsfulcrumed between their ends in pairs, the outer ends being slidablymounted on a bolt having its ends inclosed by springs, one of the leverarms being attached to a bearing on the pump and the other to a bearingon the pump rod, the said springs being adapted to be compressed by theaction of the levers.

CLAUDE D. SHELLABARGER.

Witnesses W. H. MAOFARLAN, G. J. BOWMAN.

five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

